I've just returned from an eight-day self-guided tour in Flanders offered by a Scotch tour company, "Hooked on Cycling." It was a beautiful, extremely well-routed trip, with accommodations ranging from splendid to passable. Be advised, though, that the tour is actually administered by a Dutch/Belgian company named Vos, and that from Vos you will get more accurate information (e.g., that the tour is NOT entirely flat; among its best features is riding into the hills around Kemmel, where the splendid accommodations are), wider choice (might you prefer a trip with dinners included? seven days, not eight?) and probably a better price; also that most of your fellows cyclists may well be Dutch.